const checkProvince = function(value: string) {
  const pattern = /^[1-9][0-9]/
  const provinces: AnyObject = {
    11: '北京',
    12: '天津',
    13: '河北',
    14: '山西',
    15: '内蒙古',
    21: '辽宁',
    22: '吉林',
    23: '黑龙江 ',
    31: '上海',
    32: '江苏',
    33: '浙江',
    34: '安徽',
    35: '福建',
    36: '江西',
    37: '山东',
    41: '河南',
    42: '湖北 ',
    43: '湖南',
    44: '广东',
    45: '广西',
    46: '海南',
    50: '重庆',
    51: '四川',
    52: '贵州',
    53: '云南',
    54: '西藏 ',
    61: '陕西',
    62: '甘肃',
    63: '青海',
    64: '宁夏',
    65: '新疆',
    71: '台湾',
    81: '香港',
    82: '澳门'
  }
  if (pattern.test(value)) {
    if (provinces[value]) {
      return true
    }
  }
  return false
}

const checkDate = function(value: string) {
  const pattern = /^(18|19|20)\d{2}((0[1-9])|(1[0-2]))(([0-2][1-9])|10|20|30|31)$/
  if (pattern.test(value)) {
    const year = value.substring(0, 4)
    const month = value.substring(4, 6)
    const date = value.substring(6, 8)
    const date2 = new Date(year + '-' + month + '-' + date)
    if (date2 && date2.getMonth() === parseInt(month) - 1) {
      return true
    }
  }
  return false
}

const checkCode = function(value: any) {
  const pattern = /^[1-9]\d{5}(18|19|20)\d{2}((0[1-9])|(1[0-2]))(([0-2][1-9])|10|20|30|31)\d{3}[0-9Xx]$/
  const factor = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2]
  const parity = [1, 0, 'X', 9, 8, 7, 6, 5, 4, 3, 2]
  const code = value.substring(17)
  if (pattern.test(value)) {
    let sum = 0
    for (let i = 0; i < 17; i++) {
      sum += value[i] * factor[i]
    }
    if (parity[sum % 11] == code.toUpperCase()) {
      return true
    }
  }
  return false
}

export function checkNumber(value: string) {
  return /^\d+$/.test(value)
}

export function checkPhone(value: string) {
  return /^1[3456789]{1}\d{9}$/.test(value)
}

export function checkEmail(value: string) {
  return /^[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(\.[a-zA-Z0-9_-]+)+$/.test(value)
}

export function checkIDCard(value: string) {
  if (checkCode(value)) {
    const date = value.substring(6, 14)
    if (checkDate(date)) {
      if (checkProvince(value.substring(0, 2))) {
        return true
      }
    }
  }
  return false
}

export default {
  checkNumber,
  checkPhone,
  checkEmail,
  checkIDCard
}